Industrial boiler flue gas waste heat recovery and utilization device

Abstract

The utility model discloses an industrial boiler flue gas waste heat recycling device relates to boiler flue gas recovery technical field. The utility model discloses a recycling furnace, the top and bottom of recycling furnace all are fixedly connected with connecting seat, and the inside of recycling furnace is provided with shunt subassembly and displacement component, and the outer surface of displacement component is provided with slag scraping subassembly and collection subassembly, and shunt subassembly is used for dispersing cooling water, and displacement component is used for driving slag scraping subassembly and collection subassembly and moves along shunt subassembly. The utility model shunt subassembly repeatedly interpenetrates in recycling furnace, when cooling water enters into shunt subassembly, and shunt subassembly divides cooling water into a plurality of strands through its special structure, makes the cooling water at the center of pipeline more easily contact flue gas waste heat, and a plurality of cooling water repeatedly interpenetrates and flows in recycling furnace along shunt subassembly, increases the contact time of cooling water and flue gas in recycling furnace, makes flue gas can heat cooling water fully.

Description

Technical Field

[0001] This utility model belongs to the field of boiler flue gas recovery technology, and specifically relates to a device for recovering and utilizing waste heat from industrial boiler flue gas. Background Technology

[0002] During boiler operation, the high-temperature flue gas generated by fuel combustion carries a large amount of waste heat. If the high-temperature flue gas is directly discharged into the atmosphere, it will not only cause serious energy waste, but also aggravate environmental thermal pollution and increase the fuel costs of enterprises. However, the effective recovery and utilization of flue gas waste heat can reduce boiler fuel consumption, improve thermal efficiency, and reduce carbon emissions. Therefore, flue gas waste heat recovery has become one of the core directions of energy-saving transformation of industrial boilers.

[0003] In existing industrial boiler flue gas waste heat recovery technologies, the boiler is cooled by absorbing heat from the flue gas through cooling water pipes that come into contact with the flue gas passage. The heated cooling water can then be used for auxiliary production or domestic hot water. However, some boilers use thicker cooling water pipes with larger wall thicknesses, increasing the solid thermal resistance for heat transfer. This results in poorer heating of the cooling water in the center of the pipe, leading to low heat exchange efficiency between the cooling water and the flue gas, and ultimately, insufficient recovery of the flue gas waste heat. Utility Model Content

[0004] In response to the problem that some boilers use thicker cooling water pipes with larger wall thicknesses, which increases the solid thermal resistance for heat transfer and results in poor heating of the cooling water in the center of the pipe, leading to low heat exchange efficiency between the cooling water and flue gas and the inability to fully recover the waste heat from the flue gas, this utility model proposes an industrial boiler flue gas waste heat recovery and utilization device to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a waste heat recovery and utilization device for industrial boiler flue gas, including a recovery furnace. The top and bottom of the recovery furnace are fixedly connected to connecting seats. The interior of the recovery furnace is provided with a diversion component and a displacement component. The outer surface of the displacement component is provided with a slag scraping component and a collection component. The diversion component is used to disperse cooling water, and the displacement component is used to drive the slag scraping component and the collection component to move along the diversion component. The slag scraping component is used to scrape off dust and slag from the outer surface of the diversion component.

[0006] Furthermore, the diversion assembly includes a water inlet seat, and a diversion pipe is fixedly connected to the outer surface of the water inlet seat. There are multiple sets of diversion pipes, and each set of diversion pipes is fixedly connected to the recovery furnace. A flange is fixedly connected to the outer surface of the water inlet seat.

[0007] Furthermore, the displacement assembly includes a motor, the output shaft of which is fixedly connected to a screw, and the outer surface of the screw is threadedly connected to a sliding plate. The sliding plate is slidably connected inside the recycling furnace, the motor is fixedly installed on the outer surface of the recycling furnace, and the screw is rotatably connected inside the recycling furnace.

[0008] Furthermore, the slag scraping assembly includes a mounting plate, the outer surface of which is threaded with bolts, the mounting plate is fixedly mounted on the outer surface of the sliding plate by bolts, and a conical plate is fixedly connected to the outer surface of the mounting plate, the conical plate being slidably connected to the outer surface of the diversion pipe.

[0009] Furthermore, the collecting assembly includes a first bent plate, which is fixedly connected to a sliding plate. A second bent plate is inserted into the outer surface of the first bent plate, a collecting box is fixedly connected to the side of the second bent plate, and a triangular rod is fixedly connected to the top of the second bent plate.

[0010] Furthermore, a bracket is fixedly connected to the bottom of the connecting seat.

[0011] Furthermore, a baffle is fixedly connected to the outer surface of the recycling furnace by bolts, and the outer surface of the baffle has a groove.

[0012] This utility model has the following beneficial effects: The diversion component of this utility model is repeatedly inserted into the recovery furnace. When cooling water enters the diversion component, the diversion component divides the cooling water into multiple streams through its own special structure, making it easier for the cooling water located in the center of the pipe to come into contact with the waste heat of the flue gas. Moreover, the multiple streams of cooling water flow through the recovery furnace multiple times along the diversion component, increasing the contact time between the cooling water and the flue gas in the recovery furnace, so that the flue gas can fully heat the cooling water.

[0013] When the starting motor drives the sliding plate and the cone plate to slide, the cone plate moves along the diversion pipe and removes the dust and debris on the outer surface of the diversion pipe. The removed dust and debris falls into the collection box below the cone plate, and the collection box can move with the cone plate so that the collection box can collect the dust and debris removed by the cone plate at all times. The outer surface of multiple diversion pipes is covered with cone plates, which facilitates the cleaning of the diversion pipes located inside.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the external contour structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the external contour structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of the recycling furnace of this utility model; Figure 4 For the present utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 For the present utility model Figure 3 Enlarged schematic diagram of the structure at point B; Figure 6 For the present utility model Figure 3 Enlarged schematic diagram of the structure at point C.

[0017] The attached diagram lists the components represented by each number as follows: 1. Recycling furnace; 2. Connecting seat; 3. Diversion assembly; 301. Water supply seat; 302. Diversion pipe; 303. Flange; 4. Displacement assembly; 401. Motor; 402. Screw; 403. Sliding plate; 5. Slag scraper assembly; 501. Mounting plate; 502. Bolt; 503. Conical plate; 6. Collection assembly; 601. First bending plate; 602. Second bending plate; 603. Collection box; 604. Triangular rod; 7. Bracket; 8. Baffle; 9. Groove. Detailed Implementation

[0018] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0019] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0020] Please see Figures 1-6 As shown, this utility model is an industrial boiler flue gas waste heat recovery and utilization device, including a recovery furnace 1. The top and bottom of the recovery furnace 1 are fixedly connected to the connecting base 2. The recovery furnace 1 is provided with a diversion component 3 and a displacement component 4. The outer surface of the displacement component 4 is provided with a slag scraping component 5 and a collection component 6. The diversion component 3 is used to disperse cooling water. The displacement component 4 is used to drive the slag scraping component 5 and the collection component 6 to move along the diversion component 3. The slag scraping component 5 is used to scrape off the dust and slag on the outer surface of the diversion component 3.

[0021] Both the bottom and top connecting seats 2 of the recovery furnace 1 are connected to the flue gas duct. The flue gas enters the recovery furnace 1 from the bottom connecting seat 2. When the cooling water enters the diversion component 3, the diversion component 3 divides the cooling water into multiple streams. The multiple streams of cooling water flow along the diversion component 3 in the recovery furnace 1. The waste heat of the flue gas entering the recovery furnace 1 exchanges heat with the cooling water in the diversion component 3, cooling the flue gas and heating the cooling water in the diversion component 3 at the same time, realizing the recovery and utilization of the waste heat of the flue gas. After long-term use, the displacement component 4 is activated. The displacement component 4 drives the slag scraping component 5 to move inside the recovery furnace 1. During the movement, the slag scraping component 5 scrapes off the dust and slag adhering to the outer surface of the diversion component 3. The scraped dust and slag fall into the collection component 6 below the slag scraping component 5, realizing the cleaning of the diversion component 3 and avoiding the situation where the wall thickness of the diversion component 3 increases due to the accumulation of dust and slag.

[0022] The diversion component 3 of this utility model is repeatedly inserted into the recovery furnace 1. When cooling water enters the diversion component 3, the diversion component 3 divides the cooling water into multiple streams through its own special structure, making it easier for the cooling water located in the center of the pipe to come into contact with the waste heat of the flue gas. Moreover, the multiple streams of cooling water flow through the recovery furnace 1 multiple times along the diversion component 3, increasing the contact time between the cooling water and the flue gas in the recovery furnace 1, so that the flue gas can fully heat the cooling water.

[0023] In one embodiment, the diversion component 3 includes a water inlet 301, and a diversion pipe 302 is fixedly connected to the outer surface of the water inlet 301. There are multiple sets of diversion pipes 302, and all sets of diversion pipes 302 are fixedly connected to the recovery furnace 1. A flange 303 is fixedly connected to the outer surface of the water inlet 301.

[0024] After the water inlet 301 is connected to the cooling water pipe via the flange 303, the cooling water enters the diversion pipe 302 from the water inlet 301. There are multiple diversion pipes 302, and the diameter of each diversion pipe 302 is smaller than that of the water inlet 301 and the cooling water pipe. At this time, the diversion pipe 302 can divide the cooling water into multiple streams, and the multiple diversion pipes 302 are repeatedly inserted into the recovery furnace 1, increasing the time for heat exchange between the cooling water in the diversion pipe 302 and the flue gas in the recovery furnace 1, making full use of the waste heat of the flue gas to heat the cooling water.

[0025] In one embodiment, the displacement component 4 includes a motor 401, with a screw 402 fixedly connected to the output shaft end of the motor 401. A sliding plate 403 is threadedly connected to the outer surface of the screw 402, and the sliding plate 403 is slidably connected inside the recycling furnace 1. The motor 401 is fixedly installed on the outer surface of the recycling furnace 1, and the screw 402 is rotatably connected inside the recycling furnace 1.

[0026] In one embodiment, the slag scraping assembly 5 includes a mounting plate 501, the outer surface of which is threaded with bolts 502. The mounting plate 501 is fixedly mounted on the outer surface of the sliding plate 403 by bolts 502. A cone plate 503 is fixedly connected to the outer surface of the mounting plate 501, and the cone plate 503 is slidably connected to the outer surface of the diversion pipe 302.

[0027] After motor 401 is started, its output shaft drives screw 402 to rotate. The rotation of sliding plate 403 outside screw 402 is blocked by recycling furnace 1. At this time, screw 402 can drive sliding plate 403 to slide mounting plate 501. Mounting plate 501 drives cone plate 503 to slide along diversion pipe 302, and dust and sludge on the outer surface of diversion pipe 302 are scraped off by cone plate 503. The two sets of motors 401 are of the same model, and their start and stop signals are consistent, thus achieving synchronization between the two sets of motors 401.

[0028] In one embodiment, the collection component 6 includes a first bent plate 601, which is fixedly connected to a sliding plate 403. A second bent plate 602 is inserted into the outer surface of the first bent plate 601. A collection box 603 is fixedly connected to the side of the second bent plate 602. A triangular rod 604 is fixedly connected to the top of the second bent plate 602.

[0029] The dust scraped off by the cone plate 503 falls into the collection box 603. The collection box 603 slides along with the sliding plate 403 and the cone plate 503 via the first curved plate 601 and the second curved plate 602, so that the collection box 603 can always collect the dust scraped off by the cone plate 503. The triangular rod 604 is set to guide the dust. The triangular rod 604 guides the dust into the collection box 603 and pushes the collection box 603 to move the second curved plate 602 upward, so that the second curved plate 602 separates from the first curved plate 601, and the collection box 603 can be removed for cleaning.

[0030] In one embodiment, for the aforementioned connector 2, a bracket 7 is fixedly connected to the bottom of the connector 2.

[0031] The bracket 7 is used to support the connecting seat 2 and the recycling furnace 1, so that there is a certain distance between the connecting seat 2 at the bottom of the recycling furnace 1 and the ground, which facilitates the connection of the flue gas pipe at the bottom of the connecting seat 2.

[0032] In one embodiment, for the above-mentioned recycling furnace 1, a baffle 8 is fixedly connected to the outer surface of the recycling furnace 1 by bolts 502, and a groove 9 is provided on the outer surface of the baffle 8.

[0033] The side of the baffle 8 closest to the inside of the recycling furnace 1 is equipped with a heat-resistant sealing strip to enhance the sealing between the baffle 8 and the recycling furnace 1. The groove 9 provides a leverage point for the installation and removal of the baffle 8, making it easy to move the baffle 8.

[0034] Through the above technical solution, 1. The diversion component 3 repeatedly passes through the recovery furnace 1. When cooling water enters the diversion component 3, the diversion component 3 uses its special structure to divide the cooling water into multiple streams, making it easier for the cooling water located in the center of the pipe to come into contact with the waste heat of the flue gas. Furthermore, the multiple streams of cooling water flow repeatedly through the recovery furnace 1 along the diversion component 3, increasing the contact time between the cooling water and the flue gas in the recovery furnace 1, allowing the flue gas to fully heat the cooling water; 2. The starting motor 401 carries... When the sliding plate 403 and the cone plate 503 slide, the cone plate 503 moves along the diversion pipe 302, removing dust and debris from the outer surface of the diversion pipe 302. The removed dust and debris fall into the collection box 603 below the cone plate 503, and the collection box 603 can move with the cone plate 503, so that the collection box 603 can collect the dust and debris removed by the cone plate 503 at all times. The outer surfaces of the multiple diversion pipes 302 are all covered with cone plates 503, which facilitates the cleaning of the diversion pipes 302 located inside.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A waste heat recovery and utilization device for industrial boiler flue gas, comprising a recovery furnace (1), characterized in that, The top and bottom of the recycling furnace (1) are fixedly connected to the connecting seat (2). The inside of the recycling furnace (1) is provided with a diversion component (3) and a displacement component (4). The outer surface of the displacement component (4) is provided with a slag scraping component (5) and a collection component (6). The diversion component (3) is used to disperse the cooling water. The displacement component (4) is used to drive the slag scraping component (5) and the collection component (6) to move along the diversion component (3). The slag scraping component (5) is used to scrape off the dust and slag on the outer surface of the diversion component (3).

2. The industrial boiler flue gas waste heat recovery and utilization device according to claim 1, characterized in that, The diversion component (3) includes a water inlet seat (301), and a diversion pipe (302) is fixedly connected to the outer surface of the water inlet seat (301). There are multiple sets of diversion pipes (302), and all sets of diversion pipes (302) are fixedly connected to the recovery furnace (1). A flange (303) is fixedly connected to the outer surface of the water inlet seat (301).

3. The industrial boiler flue gas waste heat recovery and utilization device according to claim 2, characterized in that, The displacement component (4) includes a motor (401), the output shaft end of the motor (401) is fixedly connected to a screw (402), the outer surface of the screw (402) is threadedly connected to a sliding plate (403), the sliding plate (403) is slidably connected inside the recycling furnace (1), the motor (401) is fixedly installed on the outer surface of the recycling furnace (1), and the screw (402) is rotatably connected inside the recycling furnace (1).

4. The industrial boiler flue gas waste heat recovery and utilization device according to claim 3, characterized in that, The slag scraper assembly (5) includes a mounting plate (501), the outer surface of which is threaded with bolts (502). The mounting plate (501) is fixedly mounted on the outer surface of the sliding plate (403) by bolts (502). A cone plate (503) is fixedly connected to the outer surface of the mounting plate (501), and the cone plate (503) is slidably connected to the outer surface of the diversion pipe (302).

5. The industrial boiler flue gas waste heat recovery and utilization device according to claim 4, characterized in that, The collecting component (6) includes a first bent plate (601), which is fixedly connected to a sliding plate (403). A second bent plate (602) is inserted into the outer surface of the first bent plate (601). A collecting box (603) is fixedly connected to the side of the second bent plate (602). A triangular rod (604) is fixedly connected to the top of the second bent plate (602).

6. The industrial boiler flue gas waste heat recovery and utilization device according to claim 5, characterized in that, The bottom of the connecting seat (2) is fixedly connected to the bracket (7).

7. The industrial boiler flue gas waste heat recovery and utilization device according to claim 6, characterized in that, The outer surface of the recycling furnace (1) is fixedly connected to a baffle (8) by bolts (502), and the outer surface of the baffle (8) is provided with a groove (9).

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